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Preparation method of magneitc polymer microspheres for in situ immobilization of noble metal catalyst
InactiveCN102814199ANot easy to loseFirmly loadedOrganic-compounds/hydrides/coordination-complexes catalystsFunctional monomerChemistry
The invention relates to a preparation method of magneitc polymer microspheres for in situ immobilization of a noble metal catalyst, and belongs to the field of polymer material and nanocomposite. The preparation method comprises the following steps of: firstly preparing hydrophilic magnetic Fe3O4 nanoparticles with high magnetic responsibility by the utilization of a solvothermal method; forming a hydrogen bond by the hydrophilic magnetic Fe3O4 nanoparticles with a hydrophilic functional monomer through adsorption; and preparing the monodispersed magnetic polymer microspheres with high magnetic responsibility and with functional groups on the surface by an in situ free radical polymerization method. By electrostatic adsorption between the functional groups on the surface and a noble metal salt solution and in situ loading of the noble metal nanoparticles for degradation of pollutants, the magneitc polymer microspheres show a stable and efficient catalytic activity.
Owner:UNIV OF SCI & TECH BEIJING
Silicon oxide-immobilized organic tin catalyst for transesterification of dimethyl carbonate and phenol ester, and preparation method thereof
InactiveCN107308984AEasy to prepareImprove catalytic performanceOrganic-compounds/hydrides/coordination-complexes catalystsCatalytic reactionsMethyl carbonateSilanes
The present invention is a silicon oxide-immobilized organic tin catalyst for transesterification of dimethyl carbonate and phenol ester, and a preparation method thereof, wherein the silicon oxide-immobilized organic tin catalyst is prepared by using the silane reagent of alkyl tin chloride as an organotin precursor, the basic composition comprises alkyl tin chloride and silicon oxide, alkyl tin chloride is used as an active component, and silicon oxide is used as a carrier. According to the present invention, the silicon oxide-immobilized organic tin catalyst shows excellent catalytic performance in the dimethyl carbonate and phenol ester transesterification reaction for synthesis of diphenyl carbonate, wherein the phenol conversion rate is 50.6%, the transesterification selectivity is more than 99.9%, and the catalyst is a heterogeneous catalyst, can reduce the toxicity of organotin, is easily separated and recovered from the reaction system after the reaction, and can be reused.
Owner:CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
Anticoagulation modification method for hemodialyzer and application thereof
ActiveCN109675134AStrong anticoagulant propertiesGood blood compatibilityOther blood circulation devicesDialysis systemsCross-linkHemodialysis
The invention discloses an anticoagulation modification method for a hemodialyzer and an application thereof. The anticoagulation modification method for the hemodialyzer comprises the following steps: triggering polymerization cross-linking reaction of a uniform mixed reaction system of olefine acid monomer, sodium sulfonate monomer, cross-linking agent monomer, initiator and water under a protective atmosphere, thereby acquiring an active heparinoid aqueous solution; keeping the membrane silk inner surface of hemodialyzer in touch with the active heparinoid aqueous solution, and then separating; heating the hemodialyzer under an acidic condition and performing auto-agglutination cross-linking, thereby acquiring the hemodialyzer with high anticoagulation property. The hemodialyzer prepared according to the invention has excellent blood compatibility and high anticoagulation property; the anticoagulation modification technology is based on a water-base system in the whole process; during the whole modifying process, only the required heparinoid substances and water are introduced; the posttreatment, such as subsequent cleaning of membrane silk, is simple; the processing steps are simple, easy for operation and realization and easy for industrial production and popularization.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Method for catalytically degrading phthalate pollutant by directly utilizing sunlight
ActiveCN106745469APromote degradationApply evenlyWater/sewage treatment by irradiationWater treatment compoundsSolar photocatalysisAdditive ingredient
The invention discloses a method for catalytically degrading phthalate pollutant by directly utilizing sunlight, and belongs to the technical field of environmental engineering. The method comprises the following steps: preparing supernate by using low-price easily-available urea as a raw material through stepwise roasting, ultrasonic peeling and centrifuging; drying to obtain nano-carbon nitride having grain size mainly distributed in a range of 30-50nm; and modifying with a coupling agent, dispersing in a methyl alcohol solution, uniformly applying and immobilizing to the inner surface of a pre-treated glass container. The treated glass container serving as a catalyst can be used for remarkably accelerating the degrading process of phthalate under sunlight radiation, and the removal rate can be 95-100 percent. The method is applicable to actual operation of a pollutant treatment field, has high efficiency and low cost, is beneficial innovation of introducing sunlight catalysis to the environmental engineering; the catalyst is a non-metallic ingredient, does not have secondary pollution risk, has uniform and firm immobilization, is convenient for reclaiming and recycling after reaction, and has relatively good commercial value and application prospect.
Owner:SHANXI UNIV +1
Preparation method for porous biomimetic catalytic material and application thereof
InactiveCN103055939AWide variety of sourcesLow priceOrganic-compounds/hydrides/coordination-complexes catalystsOxygen compounds preparation by hydrocarbon oxidationPorphyrinKetone
The invention discloses a preparation method for a porous biomimetic catalytic material and application thereof. The preparation method comprises the following steps of dissolving chitosan into acetic acid solution, stirring and dropwise adding ammonia water until the pH value is between 6.5 and 7; adding 4-(p-carboxy phenyl) metalloporphyrin ethanol solution, stirring for 24 h, and then adding NH4HCO3 solution, and uniformly stirring; drying by an infrared lamp, and performing vacuum drying to obtain the porous biomimetic catalytic material. The porous biomimetic catalytic material comprises the following components in part by weight 17.6 parts of chitosan, 8.78 parts of glacial acetic acid, 0.0878 part of ammonia water, 0.0176 part of metalloporphyrin, 43.9 parts of ammonium bicarbonate, 500 parts of distilled water and 100 parts of ethanol. Compared with the metalloporphyrin homogeneous catalytic material, the porous biomimetic catalytic material has the advantages that the metalloporphyrin is less in using amount and lower in cost and is easier to separate. The porous biomimetic catalytic material can obviously improve the one-way conversion rate of cyclohexane and the yield of main products and can be reused at least seven times, the average conversion rate of the cyclohexane is between 15.2 and 17.0 percent, and the average conversion rate of ketone alcohol is between 10.9 and 12.7 percent.
Owner:GUANGXI UNIV
Method for preparing sulfur-doped hypoxia type TiO2 photocatalyst
ActiveCN106166495ACrystal fineWell developed crystal formCatalyst activation/preparationSulfate radicalsSolar light
The invention discloses a method for preparing a sulfur-doped hypoxia type TiO2 photocatalyst. Sodium silicate serves as a silicon source, titanium sulfate serves as a titanium source, sulfate radicals serve as a doped sulfur source, sodium sulfide serves as a reducing agent, first a silica gel immobilized TiO2 / TiS2 copolymer is prepared through an ultrasound copolymerization method, the mixing amount of the sulfate radicals is changed, a product precursor is synthesized by in-situ symbiosis at 140-160 DEG C, and finally a silica gel immobilized sulfur-doped hypoxia type TiO2 photocatalyst (S / hypoxia type TiO2) material is prepared through sintering at 650-800 DEG C under the protective atmosphere of N2. Obtained results indicate that the goals of O vacancy defect and S effective doping are achieved successfully, and good conditions are created for photocatalysis red shift of the TiO2 photocatalyst and efficient utilization of solar light. Besides, the product is high in purity and good in crystal condition.
Owner:SHAANXI UNIV OF SCI & TECH
Preparation method of silver oxide loaded porous membrane
ActiveCN109225212AHigh activityGood adsorption performanceBiocideWater/sewage treatment by irradiationSolventActivated carbon
The invention discloses a preparation method of a silver oxide loaded porous membrane. The preparation method comprises the following steps: 1, polyurethane solution preparation: preparing a polyurethane solution from 15-20 parts of polyurethane particles and 80-110 parts of solvent; 2, locating solution preparation: adding 12-20 parts of activated carbon powder into the polyurethane solution, andcarrying out uniform stirring and defoaming to obtain a coating solution; 3 activated carbon based porous film preparation: uniformly coating release paper with the coating solution, then, immersingthe release paper into an aqueous solution, carrying out curing to form a film, then, taking out the film, carrying out drying, and then, stripping off the release paper; and 4, silver oxide loading:immersing an activated carbon based porous film into a silver nitrate solution, carrying out adsorption in a dark place, then, immersing the activated carbon based porous film into a sodium hydroxidesolution, taking out the activated carbon based porous film, washing the activated carbon based porous film, and drying the activated carbon based porous film to obtain the silver oxide loaded porousmembrane. The silver oxide loaded porous membrane prepared by using the preparation method has the characteristics of immobilization firmness, simplicity in recovery, repeated use and no secondary pollution and can be used for water resource purification and disinfection.
Owner:HUNAN UNIV OF SCI & TECH
Method for preparing magnetic composite biobased supported phosphotungstic acid catalyst
InactiveCN107321391AAvoid damageImprove magnetic propertiesOrganic-compounds/hydrides/coordination-complexes catalystsCavitationMicrosphere
The invention discloses a method for preparing a magnetic composite biobased supported phosphotungstic acid catalyst, aiming to provide a method which is high in supporting ratio and good in stability, and is economic and safe for preparing a magnetic composite biobased supported phosphotungstic acid catalyst. The magnetic composite biobased supported phosphotungstic acid catalyst is made by performing thermosetting through adoption of reverse suspension technology to form graphene oxide / cellulose composite microspheres; performing amino functional modification to the composite microspheres through a chemical grafting means; preparing nanometer-Fe3O4-modified magnetic composite microspheres through adoption of negative-pressure cavitation auxiliary coprecipitation technology; and using intermolecular ionic bonds and Van der Waals force on porous structured surfaces of the composite microspheres. The prepared catalyst is good in catalytic activity and magnetic effect and high in mechanical strength, can be recycled for several times, and is widely applied to various catalytic fields.
Owner:NORTHEAST FORESTRY UNIVERSITY
Highly anti-coagulant polystyrene microsphere and preparation and application methods thereof
ActiveCN109734839AStrong anticoagulant propertiesGood blood compatibilityOther blood circulation devicesOther chemical processesPolystyrene microsphereAqueous solution
The invention discloses a highly anti-coagulant polystyrene microsphere and preparation and application methods thereof. The highly anti-coagulant polystyrene microsphere comprises a polystyrene microsphere body and an anti-coagulant modification layer formed on the surface of the polystyrene microsphere body, wherein the anti-coagulant modification layer comprises a heparinoid functional layer, and the heparinoid function layer comprises an active heparinoid polymer prepared by polymerizing and crosslinking olefin acid monomers, sodium sulfonate monomers and crosslinking agent monomers. The preparation method of the highly anti-coagulant polystyrene microsphere comprises subjecting the olefin acid monomers, the sodium sulfonate monomers, the crosslinking agent monomers and initiators to polymerization and crosslinking reaction to obtain an active heparinoid aqueous solution, subjecting the polystyrene microsphere body to contact with the active heparinoid aqueous solution and then auto-polymerization and crosslinking under acid conditions to obtain the highly anti-coagulant polystyrene microsphere. The prepared highly anti-coagulant polystyrene microsphere is high in blood compatibility, and meanwhile, the preparation method of the highly anti-coagulant polystyrene microsphere is simple in technical process, easy to operate and implement and applicable to industrial productionand popularization.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Preparation method of magnetic-cellulose-microsphere-immobilized lipase catalyst
ActiveCN107326021AHigh loading rateFirmly loadedHydrolasesOn/in organic carrierRegenerated celluloseCalcium carbonate
The invention relates to a preparation method of a magnetic-cellulose-microsphere-immobilized lipase catalyst. The object is to provide a simple, economic, and efficient preparation method of an immobilized lipase catalyst. The adopted process and method comprise: taking cellulose as a raw material, taking solid calcium carbonate particles as a pore-forming agent, through adoption of a hot melt adhesive conversion method and combination with reverse suspension technology, preparing porous regenerated cellulose microspheres, carrying out epoxidation and amination grafting modification, taking micropores as a reactor for a co-precipitation reaction to prepare magnetic cellulose microspheres, and using a covalent bonding method to immobilize lipase molecules to surfaces and micropores of the magnetic cellulose microspheres. The method is abundant and available in raw materials, and the prepared magnetic cellulose carrier is relatively small in size, uniform in distribution, and large in specific surface area. Compared with a catalyst made from a conventional method, the catalyst is high in enzyme immobilization amount, good in dispersion, and firm in loading. The catalyst is convenient to recycle, and can be widely applied to fields of medicine, environment, and energy.
Owner:NORTHEAST FORESTRY UNIVERSITY
Preparation method for organic-inorganic blend membrane
ActiveCN109174195AEvenly dispersedImprove catalytic performanceWater/sewage treatment by irradiationWater treatment compoundsReactive sitePolyethylene glycol
The invention provides a preparation method for an organic-inorganic blend membrane. The preparation method comprises the following steps: adding a polyethylene glycol solution with a solid content of0.5% to 1% into a polyurethane polymer solution with a mass fraction of 10% to 18% so as to obtain a uniformly-dispersed polyethylene glycol-polyurethane solution; adding negative oxygen ion powder with a solid content of 12% to 18%; coating release paper with an organic-inorganic mixed liquid obtained in the previous step, immersing the release paper in water, and after the organic-inorganic mixed liquid is cured to form a membrane, taking the membrane out for washing and drying; immersing the obtained polyurethane-based membrane in a silver nitrate solution and carrying out lucifugal adsorption; sequentially adding a disodium hydrogen phosphate solution and cetyltrimethylammonium bromide into the silver nitrate solution and carrying out a lucifugal reaction; and taking out the polyurethane-based membrane, and performing cleaning and drying, to obtain the organic-inorganic blend membrane. The preparation method of the invention has the following characteristics: 1, the catalytic performance of a catalyst is improved, the specific surface area of the reaction is increased, reactive sites are increased, photocorrosion is reduced, and the service life of the catalyst is prolonged;and a substrate material is safe, non-toxic and environment-friendly.
Owner:HUNAN UNIV OF SCI & TECH
Supported zinc-erbium co-doped bismuth ferrite photocatalyst and preparation method and application thereof
InactiveCN109772349AImprove uniformityHigh catalytic activityWater/sewage treatment by irradiationWater contaminantsHYDROSOLBismuth preparation
The invention belongs to the technical field of photocatalytic materials, and discloses a supported zinc-erbium co-doped bismuth ferrite photocatalyst, and a preparation method and application thereof. The preparation method of the photocatalyst comprises the following steps: (1) immersing a photocatalyst carrier in an acidic solution for soaking, then taking out the photocatalyst carrier, and washing, drying and then calcining the photocatalyst carrier at high temperature; (2) preparing two identical mixed solutions of absolute ethyl alcohol and glacial acetic acid, dissolving an iron-containing compound and a zinc-containing compound in one of the mixed solutions, dissolving a bismuth-containing compound and an erbium-containing compound in the other mixed solution, and mixing the two mixed solutions under stirring to obtain a solution C; (3) adding an alkaline solution to the solution C dropwise under stirring to obtain sol; and (4) immersing the calcined photocatalyst carrier in the sol, then transferring the photocatalyst carrier to a hydrothermal reaction kettle for reaction, taking out the photocatalyst carrier after the reaction is completed, and washing and drying the photocatalyst carrier to obtain the target photocatalyst. The photocatalytic performance of the obtained catalyst is obviously enhanced compared with that of pure bismuth ferrite; the catalyst is firmly supported and is not prone to falling off; and the preparation process is simple and the repeatability is good.
Owner:SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI +1
A kind of montmorillonite immobilized chiral compound and preparation method thereof
ActiveCN110743622BFirmly loadedOrganic-compounds/hydrides/coordination-complexes catalystsCatalyst activation/preparationFluid phasePhysical chemistry
The invention relates to a montmorillonite-immobilized chiral compound and a preparation method thereof. The montmorillonite-supported chiral compound is prepared by the following method: dispersing the montmorillonite in water, adding sodium hydroxide, stirring, filtering, washing to neutrality, and drying; dissolving the transition metal salt in water, and adding another Dissolving or dispersing the chiral compound in the second solvent; adding the prepared chiral compound solution to the transition metal salt solution; taking the prepared montmorillonite, adding water, stirring evenly, and adding the metal complex dropwise to the above montmorillonite Suspension; filter and cool. The product of the invention is stable in immobilization, and the immobilized chiral compound cannot be detected in the solution after washing with liquid chromatography pure solvent for more than 100 times.
Owner:XI'AN PETROLEUM UNIVERSITY
Montmorillonite immobilized chiral compound and preparation method thereof
ActiveCN110743622AFirmly loadedOrganic-compounds/hydrides/coordination-complexes catalystsCatalyst activation/preparationFluid phasePhysical chemistry
The invention relates to a montmorillonite immobilized chiral compound and a preparation method thereof. The preparation method comprises: dispersing montmorillonite in water, adding sodium hydroxide,stirring, filtering, washing to be neutral, and drying; taking a transition metal salt, dissolving in water, taking a chiral compound, and dissolving in a second solvent; adding the prepared chiral compound solution into the transition metal salt solution; adding water into the prepared montmorillonite, uniformly stirring, and adding the metal cooperation compound into the montmorillonite suspension in a dropwise manner; filtering, and cooling to obtain the product. According to the invention, the product is stable in immobilization, and the immobilized chiral compound cannot be detected in asolution after being washed more than 100 times with a liquid chromatographically pure solvent.
Owner:XI'AN PETROLEUM UNIVERSITY
A kind of immobilized f, n, ag co-doped titanium dioxide photocatalyst and its preparation method and application
ActiveCN109772398BImprove uniformityHigh catalytic activityWater/sewage treatment by irradiationWater contaminantsAnhydrous ethanolPtru catalyst
The invention belongs to the field of photocatalytic materials, and discloses an immobilized F, N and Ag co-doped titanium dioxide photocatalyst and a preparation method and application thereof. The preparation method of the photocatalyst comprises the following steps: (1) soaking the photocatalyst carrier in an acidic solution, then taking out, washing, drying and calcining for use; (2) mixing the titanium dioxide precursor and anhydrous ethanol uniformly, Add hydrolysis inhibitor dropwise under stirring, then add ammonium fluoride solution and silver nitrate solution to obtain a mixed solution; (3) immerse the photocatalyst carrier obtained in step (1) after calcining at high temperature in step (2) After the reaction is completed, the photocatalyst carrier in the hydrothermal reactor is taken out, washed and dried to obtain the immobilized photocatalyst. Compared with pure titanium dioxide, the obtained catalyst has obviously enhanced photocatalytic performance, the catalyst is firmly supported and not easy to fall off; and the preparation process of the invention is simple and the repeatability is good.
Owner:SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI +1
A kind of multifunctional antibacterial compound preparation and its application
InactiveCN104430526BLarge specific surface areaHigh ion exchange capacityBiocideDisinfectantsZincAnti bacterial
The invention relates to a multifunctional antibacterial compound preparation and its application, relating to an antibacterial compound preparation containing silver and zinc ions and its application, in particular to an antibacterial compound preparation containing silver-loaded zinc nano-zeolite and tourmaline and its application . The purpose is to provide a multifunctional antibacterial compound preparation with good antibacterial effect, low cost and firm immobilization of silver and zinc ions and its application. The invention is a multifunctional antibacterial compound preparation, which comprises silver-loaded zinc nanometer zeolite powder and tourmaline superfine powder. The multifunctional antibacterial composite preparation of the present invention has the functions of anti-radiation, antibacterial, and deodorization, and each component therein complements each other and synergizes with antibacterial effect, and the antibacterial composite preparation of the present invention is used to prepare antibacterial fabrics, which can effectively kill bacteria on the fabrics. Harmful bacteria can avoid the spread of diseases, and because the compound preparation is safe, non-toxic, and stable, it can well meet the requirements of practical applications. The invention is applied in the field of preparation of antibacterial products.
Owner:BEIJING ZHONGKE LANGMAI NANO TECH CO LTD
Preparation method and application of visible light responsive organic-inorganic hybrid membrane
ActiveCN112808308AFirmly loadedUniform sizeBiocideWater/sewage treatment by irradiationAnti bacteriaMaterials science
The invention relates to the technical field of organic-inorganic hybrid materials, and particularly discloses a preparation method and application of a visible light responsive organic-inorganic hybrid membrane, the method comprises the following steps of: contacting and mixing a silver nitrate solution and polyurethane for dissolution, then contacting the mixed solution sequentially with sepiolite and cerium oxide to obtain a coating solution, coating a substrate with the coating solution, carrying out a contact reaction on the substrate coated with the coating solution and a YX solution to obtain a hybrid film deposited with in-situ generated AgX nanoparticles, drying the hybrid film, and illuminating the hybrid film under an ultraviolet lamp to obtain the visible light responsive organic-inorganic hybrid membrane. The prepared organic-inorganic hybrid membrane has excellent photocatalytic performance of visible light response, can be used as an efficient antibacterial material and has good antibacterial ability, the preparation method is simple, and the prepared film is stable in structure and easy to recycle.
Owner:HUNAN UNIV OF SCI & TECH
Preparation method for porous biomimetic catalytic material and application thereof
InactiveCN103055939BWide variety of sourcesLow priceOrganic-compounds/hydrides/coordination-complexes catalystsOxygen compounds preparation by hydrocarbon oxidationPtru catalystAlcohol
Owner:GUANGXI UNIV
A kind of preparation method of cellulose acetate-based hybrid film
ActiveCN109134907BStir wellCause secondary pollutionWater/sewage treatment by irradiationSpecific water treatment objectivesCellulose acetateEthylene glycol
The invention discloses a preparation method of a cellulose acetate based hybrid membrane. The preparation method includes the steps: preparing cellulose acetate particles and solvents into celluloseacetate solution; adding fibroin powder into the cellulose acetate solution, uniformly stirring the solution and defoaming the solution to obtain mixed solution; uniformly coating release paper with the mixed solution, immersing the release paper into water solution, taking out the release paper after a membrane is formed, drying the release paper and then peeling the release paper to obtain a cellulose acetate / fibroin hybrid membrane; immersing the cellulose acetate / fibroin hybrid membrane into silver nitrate solution, performing adsorption in a dark place, immersing the cellulose acetate / fibroin hybrid membrane into glycol solution of sodium hydroxide, immersing the cellulose acetate / fibroin hybrid membrane into ferric chloride solution, and taking out, washing and drying the cellulose acetate / fibroin hybrid membrane to obtain the cellulose acetate based hybrid membrane. The prepared cellulose acetate based hybrid membrane has the advantages of biodegradability, immobilization firmness and easiness in recovery, and can be used for water resource purification, disinfection and sterilization.
Owner:HUNAN UNIV OF SCI & TECH
A kind of nitrogen, sulfur co-doped silica gel immobilized tio2 photocatalyst and preparation method thereof
ActiveCN106268904BGive full play to visible light photocatalytic activityCrystal finePhysical/chemical process catalystsWater bathsSulfate radicals
The invention discloses a nitrogen and sulfur co-doped silica gel-immobilized TiO2 photocatalyst and a preparation method thereof. The method uses ethyl orthosilicate and butyl titanate as precursor raw materials for immobilizing TiO2, and uses sulfuric acid and nitric acid. The mixed acid is used as a nitrogen and sulfur doping source and an initiator of the sol-gel reaction to prepare a sol, and then is left to stand at a constant temperature in a water bath or aged at room temperature to prepare a silicon-titanium gel copolymer containing sulfate and nitrate. , and then use the hydrothermal autoclaving method to symbiotically synthesize the product precursor in situ, and finally sinter it under a nitrogen atmosphere to obtain a nitrogen and sulfur co-doped silica gel-immobilized TiO2 photocatalyst material. The photocatalyst produced by this method has high purity and good crystallinity. Nitrogen and sulfur co-doped TiO2 crystal grains are in the silica gel mesoporous skeleton structure, achieving effective co-doping of N and S and broadening the light response of the TiO2 photocatalyst. range, achieving the purpose of photocatalytic red shift and efficient utilization of sunlight.
Owner:SHAANXI UNIV OF SCI & TECH
A kind of preparation method of silver oxide supported porous membrane
ActiveCN109225212BStir wellSolve problems that can no longer be reusedBiocideWater/sewage treatment by irradiationActivated carbonAqueous solution
The invention relates to a preparation method of a silver oxide loaded porous membrane. The method comprises the following steps: step 1, preparing polyurethane solution: preparing polyurethane solution from 15 to 20 parts of polyurethane particles and 80 to 110 parts of solvent; step 2, preparing coating solution: adding 12 to 20 parts of active carbon powder to the polyurethane solution, Stir evenly and defoam to obtain the coating solution; step 3, prepare activated carbon-based porous film: apply the coating solution evenly on the release paper, immerse in the aqueous solution and solidify into a film, take it out, and peel off the release paper after drying; step 4 . Silver oxide loading: immerse the activated carbon-based porous film in a silver nitrate solution to avoid light and absorb it, then immerse it in a sodium hydroxide solution, take it out, wash, and dry to obtain a silver oxide-loaded porous film. The silver oxide-supported porous membrane of the invention has the characteristics of firm immobilization, easy recovery, multiple use and no secondary pollution. It can be used for water purification and disinfection.
Owner:HUNAN UNIV OF SCI & TECH
Anticoagulant modification method and application of a kind of hemodialyzer
ActiveCN109675134BStrong anticoagulant propertiesGood blood compatibilityOther blood circulation devicesDialysis systemsSulfonateHemodialysis care
The invention discloses an anticoagulant modification method of a hemodialyzer and an application thereof. The anticoagulant modification method of the hemodialyzer comprises: in a protective atmosphere, polymerizing a uniformly mixed reaction system comprising an alkenoic acid monomer, a sodium sulfonate monomer, a crosslinking agent monomer, an initiator and water Cross-linking reaction to obtain an active heparin-like aqueous solution; contacting the inner surface of the membrane filament of the hemodialyzer with the active heparin-like aqueous solution, followed by separation; Obtain a hemodialyzer with high anticoagulant performance. The hemodialyzer prepared by the present invention has excellent hemocompatibility and high anticoagulant performance, and the anticoagulant modification technology is based on a water-based system throughout, and only necessary heparin-like substances and Water, subsequent cleaning of membrane filaments and other post-treatments are very simple; at the same time, the process steps are simple, easy to operate and realize, and easy to promote industrial production.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Construction method of nanocellulose paper-based biosensor
ActiveCN108931565BFewer extraction stepsEasy to fixMaterial electrochemical variablesRough surfaceHemicellulose
The invention relates to a method for constructing a biosensor, specifically to a method for constructing a nanocellulose paper-based biosensor. The objective of the invention to overcome the problemsof low detection efficiency and poor detection accuracy of conventional paper-based biosensors caused by great internal porosity and rough surfaces in the prior art. The method comprises the following steps: 1, peparation of nanocellulose: sequentially subjecting a cellulose raw material to extraction and delignification so as to obtain total cellulose, and then carrying out mechanical pretreatment, chemical-mechanical mixed pretreatment or biomechanical mixed pretreatment to obtain aqueous hemicellulose-containing nanocellulose liquid; 2, preparation of nanopaper; and 3, construction of thenanopaper-based biosensor. Detection results show that the nanopaper prepared in the invention has no obvious voids and micron-order roughness, wherein the porosity of the nanopaper is more than 1%, and the roughness of the nanopaper is less than 1 [mu]m. The method provided by the invention is applied to the field of biosensors.
Owner:SHANDONG AGRICULTURAL UNIVERSITY
A method for directly using sunlight to catalyze the degradation of phthalate pollutants
ActiveCN106745469BPromote degradationApply evenlyWater/sewage treatment by irradiationOrganic-compounds/hydrides/coordination-complexes catalystsSolar photocatalysisTreatment field
The invention discloses a method for directly utilizing sunlight to catalytically degrade phthalate pollutants, and belongs to the technical field of environmental engineering. Using cheap and easily available urea as raw material, the supernatant is obtained through segmented roasting, ultrasonic stripping and centrifugation. After drying, nano carbon nitride with a particle size distribution of mainly 30 to 50 nm is obtained, which is then modified by a coupling agent and dispersed. In methanol solution, evenly coated and fixed on the inner surface of the pre-treated glass container, using it as a catalyst can significantly accelerate the degradation process of phthalates under sunlight, with a removal rate of 95 to 100%. The invention is suitable for actual operations at pollutant treatment sites, has high efficiency and low cost, and is a beneficial innovation in introducing solar photocatalysis into environmental engineering. At the same time, the catalyst is a non-metallic component, has no risk of secondary pollution, and is evenly loaded. It is strong, easy to recycle and reuse after reaction, and has good commercial value and application prospects.
Owner:SHANXI UNIV +1
A kind of preparation method of polyurethane-based composite photocatalytic film
ActiveCN109126887BStir wellGood flexibilityWater/sewage treatment by irradiationWater treatment compoundsPolymer sciencePhoto catalysis
The invention discloses a preparation method of a polyurethane-based composite photocatalytic film. The polyurethane particles are fully dissolved in a solvent to obtain a polyurethane solution; silk fibroin powder is added to the polyurethane solution, stirred evenly, and defoamed to obtain a coating liquid; The coating liquid is evenly coated on the release paper, and the film is quickly immersed in the aqueous solution to solidify into a film, then take out, dry, and peel off the release paper to obtain a polyurethane / silk fibroin blend film; immerse the polyurethane / silk fibroin blend film in a silver nitrate solution Take it out after being absorbed in the middle to avoid light, then immerse it in sodium chloride solution, take out, wash, and dry to obtain the AgCl material supported by the polyurethane / silk fibroin blend film; the AgCl material supported by the polyurethane / silk fibroin blend film is irradiated under a UV lamp , the polyurethane-based composite photocatalytic film was obtained. Provide its application in degrading organic pollutants in water and sterilizing and disinfecting. The invention has the characteristics of easy availability of materials, good catalytic performance, easy recovery and no secondary pollution.
Owner:HUNAN UNIV OF SCI & TECH
Preparation method and application of stationary phase coating material for identification of trace substances
Owner:SHANDONG UNIV
A kind of preparation method of sulfur-doped oxygen-deficiency tio2 photocatalyst
ActiveCN106166495BCrystal fineWell developed crystal formCatalyst activation/preparationSolar lightSulfate radicals
The invention discloses a preparation method of sulfur-doped oxygen-deficient TiO2 photocatalyst. Using sodium silicate as the silicon source, titanium sulfate as the titanium source, sulfate as the doping sulfur source, and sodium sulfide as the reducing agent, the silica gel-supported TiO2 / TiS2 copolymer was first prepared by ultrasonic copolymerization, and then the doping of sulfate was changed. The product precursor was symbiotically synthesized in situ by hydrothermal autoclaving at 140-160°C, and finally sintered at 650-800°C under a N2 protective atmosphere to obtain a silica gel-supported sulfur-doped oxygen-deficient TiO2 photocatalyst (S / Oxygen-deficient TiO2) material. The results obtained show that the two purposes of O vacancy defects and effective S doping were successfully achieved, creating good conditions for the photocatalytic red shift of TiO2 photocatalyst and efficient utilization of sunlight. Moreover, the product has high purity and good crystallization state.
Owner:SHAANXI UNIV OF SCI & TECH
Method for preparing stationary phase coating material for trace substance identification and application of material
InactiveCN102634279AEasy to makeFirmly loadedComponent separationCoatingsHydrosilylationNitrogen gas
The invention relates to a method for preparing a stationary phase coating material for trace substance identification and application of the material. The method comprises the following steps of: adding carbosilane hyperbranched macromolecules with allyl terminals and MeHSiCl2 into a solvent, adding a Kastedt catalyst, and performing hydrosilylation reaction in the presence of nitrogen; adding triethylamine, fully dried cyclodextrin and fully dried tetrahydrofuran (THF) for bonding reaction; and finally cooling and separating, thus obtaining the material. The material is coated on capillary inner columns; and the material has the advantages of uniform film formation, high column efficiency and high adsorption quantity, and has analysis and identification capability for trace substances.
Owner:SHANDONG UNIV
Hemoperfusion device filled with immobilized L-asparaginase and preparation method and application thereof
ActiveCN112704774AThe size is easy to controlFirmly loadedImmobilised enzymesHydrolasesLymphocytic cellEngineering
The invention discloses a hemoperfusion device filled with immobilized L-asparaginase and a preparation method and application thereof. The hemoperfusion device is filled with the immobilized L-asparaginase in the form of a packed column by adopting a covalent bond immobilization method and adopting a polymer carrier. The prepared hemoperfusion device filled with the immobilized L-asparaginase is safe and efficient in the aspect of treating acute lymphocytic leukemia.
Owner:苏州森康微球医疗科技有限公司
Supported polyoxometallate material for preparing aniline through nitrobenzene hydrogenation
PendingCN113751068AEasy to prepareLow priceOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystHydrogenation reaction
The invention discloses a supported polyoxometallate material for preparing aniline through nitrobenzene hydrogenation. A prepared nitrobenzene hydrogenation reaction catalyst is a novel efficient recyclable heterogeneous catalyst which takes a nitrogen-rich covalent organic porous material as a carrier and is loaded with polyoxometallate. According to the catalyst prepared by the invention, hydrazine hydrate is taken as a reducing agent under a mild condition, and nitrobenzene is highly selectively reduced to generate aniline. The supported polyoxometallate material has the advantages of simple preparation method, small loading capacity, short reaction time, high catalyst utilization rate, high selectivity, low loss and the like, and has application value in the industrial production process.
Owner:JILIN INST OF CHEM TECH
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